Dogs do not have facial muscles and cannot make expressions, but the action they make happens to be similar to human laughter.
1. Shiba Inu originated in Japan and is an ancient breed. Its limbs are thick, strong and powerful, and it has a strong sense of vigilance. It can guard the house for the owner. Shiba Inu is known as a walking emoticon package, and emoticons are popular on the Internet. Many people use its emoticons when chatting. Because of its cute appearance, many people have ignited the idea of raising it.
2. What are the dogs that can laugh: In addition to Shiba Inu, there are Pomeranian, Samoyed, Golden Retriever, etc. Among them, Samoyed has the title of smiling angel. It always has a smile on its face, and its smile is very sweet. It has a very gentle personality and likes to get close to people. Pomeranian's smile is also very sweet. They can always feel laughing in front of their owners.
3. Researchers from the United States and the United Kingdom analyzed the facial muscles of dogs and wolves and found that dogs have two muscles on their faces that wolves do not have. These muscles control the facial expressions around the eyes, allowing dogs to show eyes that are extremely attractive to humans. The research report was published in the journal PNAS. From the perspective of biological evolution, the structure of dogs' eye muscles changes very quickly, which is probably directly related to the close interaction between dogs and humans.
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